You cannot drown in Quick Sand!

fuckyeahphysica:

No! Seriously. You cannot. 

But I saw it in the movies or in the cartoon (C’mon bro, cartoon?). The gimmick that movies bring in, phew! They sometime just butcher the science out of things for entertainment.

What is Quick Sand? 

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Remember Oobleck, the non- newtonian fluid that hardens on the application of force?

Well, Quick Sand ( also a non-newtonian fluid ) liqueifies on the application of force.

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Why you can’t sink?

Quicksand itself is harmless: a human or animal is unlikely to sink entirely into quicksand at all due to the higher density of the fluid ( It has twice the density of human )

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It’s the same reason why a ship although made up of steel, yet stays afloat at sea. “The heavier the fluid, the better things float.”

But for the ship to sink it has to push aside some water, which
has nowhere to go but up. So it’s a question: does the ship ‘want’ to
sink more than the water ‘wants’ not to rise?

It turns out that just
depends on whether the ship weighs more or less than the amount of water
that would fill the same space. Real ships have lots of air inside, so
they weigh less than the same volume of water, so they float.

Getting out of it albeit,  is a real pain.

That being said, it is no joke that people have lost their lives in Quicksand. But the rationale for their death is often misattributed.

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It’s not the quicksand that will kill you, but the sunlight, dehydration, carnivores, omnivores, hypothermia or tides that will.

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It takes a feat of strength to get out of one though.

A study published in Nature
found that the force needed to pull your foot out of quicksand at a
speed of one centimentre per second would be equivalent to lifting a
medium-sized car (in air).

So,How do you get out of it?

Well, who would be a better person to explain it than Bear Grylls himself.

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Getting out of a Quicksand with Bear Grylls.